Kmart online has a great little soft grey teepee. We/Santa bought one for our little two-year-old boy for Christmas. I wouldn't recommend the tents for children older than about two, as they are fairly small. At the moment though, our little guy is loving it.
We also grabbed some other sensory items (see below) for him and popped them in a basket, creating an engaging place for him to chill out.
Teepee Now $59 on Clearance was $139. Online exclusive.
Stretchy Robot Fidget Tool $3.75 each
Sticky & Stretchy Animals (15 pieces) Just like "Sticky Gecko" in Bluey $3.75